Your chances of securing a seat in PEC Chandigarh for a lower branch like Civil or Industrial and Production Engineering in the Home State Quota with a 91.7 percentile in JEE Mains.

Factors to Consider:

• Previous Year Cutoffs: Refer to the previous year's cutoff ranks for the branches you're interested in, specifically for the Home State Quota. This will give you a good estimate of the competition.
• Seat Availability: The number of seats available in each branch can fluctuate from year to year.
• Counseling Dynamics: The counseling process can be dynamic, with seat allotments and cutoffs changing with each round.

Based on the limited information provided, it's challenging to predict your exact chances. However, a 91.7 percentile is a decent score, and you have a reasonable chance of securing a seat in a lower branch like Civil or Industrial and Production Engineering in PEC Chandigarh under the Home State Quota.

Here are some tips:

• Participate Actively in Counseling: Be diligent during the counseling process and strategically choose your college and branch preferences.
• Explore Other Options: If you don't secure your preferred branch in PEC Chandigarh, consider other reputable engineering colleges in your home state or explore options outside of PEC.
• Stay Updated: Keep track of the latest information and announcements regarding counseling rounds and seat allotments.

Remember, the final decision depends on various factors, including the overall competition and the specific cutoffs for the year.

I hope this helps!